Nanofibrous poly(ethylene oxide)‐based structures incorporated with multi‐walled carbon nanotube and graphene oxide as all‐solid‐state electrolytes for lithium ion batteries

Abstract

Nanofibrous solid polymer electrolytes were prepared using the electrospinning method. These nanofibres were constructed from poly(ethylene oxide), lithium perchlorate and ethylene carbonate, which were incorporated with multi‐walled carbon nanotube (MWCNT) and graphene oxide (GO). The morphological properties of the as‐prepared electrolytes and the interaction between the components of the composites were characterized using scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. X‐ray spectra and differential scanning calorimetry indicated an increase in amorphous regions of the nanofibrous electrolytes on addition of the fillers. However, the crystalline regions were increased on incorporation of fillers into polymeric film electrolytes. The conductivity values of the nanofibrous electrolytes reached 0.048 and 0.057 mS cm−1 when 0.35 wt% MWCNT and 0.21 wt % GO were introduced into the nanofibrous structures, respectively. The capacity and cycling stability of the nanofibrous electrolytes were improved by incorporation of MWCNT filler. Furthermore, stress and elongation modulus were improved at low MWCNT and GO filler contents. Results revealed that the nanofibrous structures could be promising candidates as solvent‐free electrolytes applicable in lithium ion batteries. © 2019 Society of Chemical Industry

Electrospun core‐shell nanofibers based on polyethylene oxide reinforced by multiwalled carbon nanotube and silicon dioxide nanofillers: A novel and effective solvent‐free electrolyte for lithium ion batteries

“…The results showed that increasing of the MWCNTs filler content in the nanofibers led to the formation of the finer fibers. As discussed in the previous study, electrospinning process is influenced by the addition of MWCNT filler into the polymer solution 29 . First, MWCNT particles increase the solution conductivity and lead to the reduction of the fiber's diameter.…”

“…The obtained data supports the previous studies concluding that the ionic conductivity could be enhanced by the addition of SiO 2 and MWCNT fillers. However, the as‐spun CNT3Si@CS4 membrane illustrated higher ionic conductivity compared with the electrospun structures incorporated with the SiO 2 and MWCNT nanoparticles 29,32 . The observed difference may be assigned to higher ratio of the EC plasticizer content in the electrospun filler‐filled nanofibers.…”

“…Second, MWCNT nanofiller enhances the solution viscosity and the expelled mass flow from the syringe needle, which both cause fabrication of the thicker fibers. So, it seems that the electrical conductivity of the solution has overcome the solution viscosity and the mass flow resulting in the fabrication of the finer fibers 29 …”

“…According to the obtained results, the highest ionic conductivity of 0.087 mS.cm −1 could be obtained by insertion of SiO 2 nanofillers into the PEO‐based electrospun fibers. Moreover, the MWCNT nanoparticles presented a great impact on the improvement of the cycling stability of the electrospun electrolytes 29 . In order to benefit both high ionic conductivity and proper cycling durability along with the reduction of battery shorting risk, the coaxial electrospinning technique was employed in this article.…”

Multi‐walled carbon nanotubes incorporation into cross‐linked novel alkaline ion‐exchange membrane for high efficiency all‐solid‐state supercapacitors

“…Overall, many studies have demonstrated that hydroxide conductivity and other performance characteristics of the AEM membranes require further improvement. 26,33,34 Recently, many researchers have sought to enhance the physicochemical properties of the polymer electrolyte membranes by adding fillers such as ionic liquids and inorganic nanoparticles [35][36][37][38][39] (ZrO 2 , 40 SiO 2 , 39 and CNTs [41][42][43][44] ). Wen et al 45 found that addition of ionic liquids in polymer films did enhance the OH − conductivity and performance in SC.…”